tt(e -h 
70. 
and vas aberrant , o-" the ml.-* ar- found in tho later ata as, with 
rsore woo one pj.ro s: remnants than 1 either oox. The free n&rtin follows 
the Sitie in deg ~n ration of the nssonsphros, not the female, but some 
si na of the early female condition are present bora also. 
(11) fbo development of the urogenital sinus d rivolives in tho 
fsisalo, sii>lo and free-wartin, in “utmarised in the d toiled description 
of those organs ar,d their development, and will no? be repeated hers, 
except to point out Of in that in fres-iaarti no tho characterization 
, iven for the female is eq ally applic&blo, with the exception that 
tho anaer of oponirr of tho vagina and ’olffiaa ducts int? tho si nos 
varies; all the fro^ artins CM nho M os. So* 8 specimen wore 
fe.aa-o in that respect, and this one, in otho re..pcois, wao in a noro 
advanooo sals condition than the others. Those ducts are aeacderrml 
in origin* and the r-^st of tho structures iarlvsc ■ the sinus • 
tirely, are entoderm* in origin. 
(12) The normal o^v«lo w&n t of the rale and ferale external 
genitalia are a scribed under that heaiinj. in the general descrip¬ 
tions, a was also that of tho free-wartin. It will he worthy of 
note here that there was not found in any of th« froe-nariinr used 
in this study, nor in any o the 31 others collected whil* pursuing 
ti.is investigation, any sin of modification of ext r al genitalia 
in the wale direction, there is some tendency to smaller Rise of 
ex ernal genitalia in sobs Of the cases, but th.y a », in all cases 
exaniaoci, completely feiaU* * and hawe otiiy such minor variations a 
are feuej i- single— f?orn fe®al s* he .cro*u fails to forts, even 
shea de cent of the gonad? talc s place, a in rales, and aiders are 
pr u’s ?nt in all eai>£:? examined. 
( 13 ) The d*ta given above support th© theory of hillie that 
the free-sartin condition is tb result of the action of a ale sox- 
hornone♦ probably eecreto- in the inter titial cells o the testis 
